@misc{indiciae4ed49ad30bee,
  title = {Hydrology of the Helena area bedrock, west-central Montana, 1993-98},
  author = {Joanna N. Thamke and Mitchell W. Reynolds},
  year = {2000},
  doi = {10.3133/wri20004212},
  url = {https://pubs.usgs.gov/publication/wri20004212},
  note = {Source identifier: wri20004212}
}